The front brake master cylinder on my 1979 honda gl1000 is mushy and needs replaced. I have bought a new product for this model vs rebuilding. What is the easiest way to switch and if bleeding is necessary is a step by step process for novices?

i replaced mine on my 87 and just bled everything. I believe when you remove the banjo, air will enter, might be wrong, but i went ahead and just bled to remove air. im not an expert but i'm sure a pro on this topic will help.